在10G硬件设备正常情况下，下列关于交叉板的业务主备和时钟主备关系说法正确的是（）。_传输设备_全学科试题题库

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在10G硬件设备正常情况下，下列关于交叉板的业务主备和时钟主备关系说法正确的是（）。
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